Insulating structure



June 5,1934. H B, UNDSAY 1,961,888

INSULATING STRUCTURE Filed July 25, 1950 101 16 10 J I J8 I E 2i r Patented June 5, 1934 UNITED STATES 1,961,888 INSULATING STRUCTURE Harvey B. Lindsay, Evanston, Ill., assignor to Dry Zero Corporation, Chicago, Ill., a corporation of Delaware Application July 25, 1930, Serial No. 470,732

1 Claim.

My invention relates, more particularly, to thermal insulating structures formed of a body portion comprising loose insulating material such as for example kapok or other fibrous material, or granulated cork, encased in an envelope, such as paper, and provided commonly of, rec tangular form, thereby providing units for assembly into the position of use, as for example into framework for forming an insulating wall.

It is desirable in structures of this character to provide against access of moisture to the insulating material of the body portion and also to provide against distortion of the insulating unit structure out of desired rectangular form not only in the handling of the unit but also when positioned for use and preventing disintegration and cracking of the unit, it being my primary object to provide a novel, simple and economical construction having the attributes above mentioned.

Referring to the accompanying drawing: Figure 1 is a perspective View of one form of an insulating structure constructed in accordance with my invention.

Figure 2 is an enlarged sectional view of the structure of Fig. 1 the section being taken at the line 22 on Fig. 1 and viewed in the direction of the arrows.

Figure 3 is a plan view of one form of a coated blank of sheet material of a desirable form for wrapping about the body portion of insulating material shown as superposed thereon and partly broken away; and

Figure 4, a broken perspective view of a corner portion of the coated blank with the body portion of insulating material superposed thereon.

In accordance with the preferred illustrated embodiment of the invention, I provide a blank of sheet material preferably of tough paper of the general form shown in Fig. 3 and presenting rectangular portions 5 and 6 of the same shape and dimensions which are connected together along their parallel adjacent edges at folding lines 7 and 8 by a rectangular portion 9 of the blank of relatively great length and narrow Width. The blank is further formed to provide laps 10 and 11 at the ends of the rectangular por tion 5, laps 12 and 13 at the ends of the rectangular portion 6, and laps 14 and 15 at the edges of the portions 5 and 6, respectively, opposite those at which these portions are connected with the portion 9, the laps 10 to 15, inclusive, being connected with the portions 5 and 6 carrying them, at folding lines 16, 1'7, 18, 19, and 21, respectively, and each lap 10, 11, 12 and 13 being preferably provided rt one end, as shown, with a triangular tab 100 hinged thereto at 101.

The body portion of the insulating structure and represented generally at 22 comprises a body 23 of insulating material such as for example above set forth and shown as fibrous and in the form of a body of rectangular shape and of substantially the same size and shape as each envelope portion 5 and 6, the body portion 22 preferably being provided with framing, or re-en- 5 forcing, means at its lateral edge portions, these means in the particular construction shown and represented at 24, being in the form of channel members as for example of chip board applied to embracing position .about the four lateral edges 0 of the body portion 22 as shown. These framing, or re-enforcing means may be formed of a single sheet of suitable material such as chip board above mentioned and slit and folded as shown to cause it to be embracingly positioned about the body of insulating material 23.

The envelope-forming blank is coated throughout its upper surface with a coating or casing 25 of tacky material as for example and preferably tacky asphalt preferably of such composition, as is well known in the art, that it will remain in the form of a continuous coating or layer and, not crack, at the low temperatures to which it would be subjected in use.

In producing the insulating structure the body- 5 portion 22 is applied to the coated surface of one of the rectangular portions 5 and 6 as shown in Figs. 3 and 4 and the blank then folded into the conditionshown in Figs. 1 and 2 to completely encase the body portion 23 thereby producing a .boxlike structure, with the triangular portions underlying the adjacent square ends of the' flaps, the coating 25 on the blank in the wrapping operation referred to becoming tightly adhered to the body portion 22 throughout the external surface of the latter and to the lapped portions of the envelope and eiiectually sealing the body portion 22 against access of moisture thereto.

It will be manifest from the foregoing that the parts comprising the insulating structure are thus bound together as a unit preventing disintegration or cracking of the structure or its distortion out of rectangular shape.

Furthermore, by wrapping the body portion 22 completely in the envelope-forming sheet, coated as stated, an excellent moisture seal is provided, and this is particularly true inasmuch as all of the joints in the envelope are self-sealing in the wrapping of the envelope-folding sheet about the body portion 22, as the tacky material forms its own seal, thus making coating 25 a complete casing.

The structure thus in accordance with the invention comprises a core which in the particular illustrated embodiment of the invention comprises the body 23 of fibrous material and marginal reinforcement, enclosed within an envelope of tacky waterproofing material. The composition of the core, however, may be modified either by omitting the marginal reinforcement or modifying the reinforcement shown.

Another advantage arising from the constructing of an insulating structure as above described is that the structural value of a the construction is greatly augmented as the portions of the body portion 22 at the exterior surfaces thereof are bound by the coated envelope thus avoiding separation of these surface portions, a feature which is of particular value where the insulating portion of the body portion 22 is formed of a slab of cork board or other material which can disintegrate and the integrity of which it is desired be maintained.

Another advantage is the elimination of air pockets between the body portion 22 and the envelope. In the ordinary wrapping of insulation air pockets of considerable area often exist between the envelope and the insulating material, due to normal commercial irregularities, these air pockets being very undesirable as under conditions of condensation they offer but little impediment and are usually the points at which condensation occurs. By adhering the body portion 22 throughout its area to the envelope in which it is encased formation of such' air pockets is prevented.

It will also be observed that an insulating structure formed as above described presents great resistance to distortion out of normal shape, whether or not the body portion 22 is formed with framing or re-enforcing means such for example as that above described.

While I have illustrated and described a particular construction embodying my invention and referred to certain modifications, I do not wish to be understood as intending to limit it thereto as the same may be further variously modified and altered without departing from the spirit of my invention. Thus, if desired, and by way of example of a further change which may be made, the envelope, instead of being made of a single sheet of material, may be made of separate sections in which case the surfaces of the sections forming the inside of the envelope should be entirely covered by the adhesive material.

What I claim as new, and desire to secure by Letters Patent, is:

An insulating structure comprising, in combination: a core of insulating material; a covering for said core formed of a blank initially coated with permanently tacky asphalt upon its core engaging side; said blank comprising a body portion to cover the opposite sides and one edge 

